arm64: dts: mediatek: mt8192-asurada: Fix voltage constraint for Vgpu

The MT8192 SoC specifies a maximum voltage for the GPU's digital supply
of 0.88V and the GPU OPPs are declaring a maximum voltage of 0.80V.

In order to keep the GPU voltage in the safe range, change the maximum
voltage for mt6315@7's vbuck1 to 0.80V as sending, for any mistake,
1.193V would be catastrophic.

Fixes: 3183cb62b033 ("arm64: dts: mediatek: asurada: Add SPMI regulators")
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Chen-yu Tsai <wenst@chromium.org>
Tested-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20230301095523.428461-12-angelogioacchino.delregno@collabora.com
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
index df477eb89f21c147f7e9d4d3fc254cb68e506ff7..8570b78c04a49dada28b4ed29cfa871f64dc0703 100644 (file)
--- a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
@@ -1408,7 +1408,7 @@
                                regulator-compatible = "vbuck1";
                                regulator-name = "Vgpu";
                                regulator-min-microvolt = <606250>;
-                               regulator-max-microvolt = <1193750>;
+                               regulator-max-microvolt = <800000>;
                                regulator-enable-ramp-delay = <256>;
                                regulator-allowed-modes = <0 1 2>;
                        };